Fix Overheating Error in Dyson AM09
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The red arrow indicates the area where we'll focus our cleaning efforts.
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Start by powering the fan on. Then, switch it to the highest setting.
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Use compressed air aimed at the crevice toward the back part of the fan (where the arrow is pointing). Keep shooting compressed air in at various angles up and down the slots until dust stops coming out.
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Try the heating function to see if the error is still there. If this doesn’t work, proceed to the next steps.
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To begin, take off the D-shaped screw cover located at the bottom of the oval by pulling it upwards. Once you remove the cover, you'll see a T8 screw that needs to be unscrewed to move forward.
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To unlock the top part from the bottom part, twist it 15 degrees counterclockwise. The cylindrical base can be tough to grip, so use a belt as a strap wrench instead.
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If you're having trouble working with the cables, you can try removing the fan core from the tilt stage. To do this, unscrew the four T8 screws located beneath the fan core (two screws are visible at each of the maximum tilt positions). This will allow you to separate the fan core and make it easier to work with the cables.
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Two T8 screws hold down the cover over this. The blade connectors have a little tab lock that must be pushed while pulling them apart.
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The black wire is for the temperature sensors.
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The white wire is for power (disconnects near the base, under a woven sleeve that slides out of the way. You don't need to touch the heatsink). The servo connector pulls apart easily.
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The arrows show the 4 places to disconnect the wires so you can separate the top from the bottom. The white connectors under the sheath may also have a tiny lock tab that you need to push in while pulling them apart. Make sure to take note of how the wires run before take off the cover.
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Make sure to mark the black wires before disconnecting so that reconnect them correctly when putting it back together. (Photos in reverse order).
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There are two bolts holding the servo down (removed in this photo), and two holding the white plate down. It is not necessary to remove these, but might make things a little easier a couple steps from now.
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Use a boxcutter to repeatedly score around the sides and top of the outside trim, in order to gain access to the heater cores. This is glued in place, but around the bottom it is a small amount of glue, so if you completely separate the top and sides you can break the glue at the bottom. The air slot core with heaters will slide out.
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Once you remove the silver face plate, the black and white part you see simply lifts out from the back white shell.
There is a thin flange at the end of the main body, all around the oval opening, that is glued into the grey/silver outside trim. The photo of the black unit shows this step having been performed by deliberately slicing the thin flange through, at the edge of the grey/silver trim. The other side of the trim has features that align it to the main body, so if you do it this way, it is possible to glue everything back together without any sign of disassembly. But, it probably won't be as strong. The photos of the white unit show a cutter being used to slice the glue, in order to preserve the main body flange. You may find that you have to damage the trim this way, but will preserve the ability to glue it back in place in exactly the same way it was to begin with.
After I seperate trim with a utility knife I still do not have access to the heating element, there is another casing inside which is held together with 6 rivet like plastic screws. Any recommendations
As the above person mentioned, even after you remove the trim, you still can not access the heating elements. I was able to use canned air and a thin bottle brush to clean the elements from the bottom looking inside. It worked after I did this.
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Remove the two bolts (small arrows) then lift the heater slot cover (black plastic) from the side where the big arrows is pointing. You can then remove the heater cores (2nd picture). They can be turned out without bending any of the tabs. The same is true of the temperature sensors. The caked on (and toasted) dust can simply be vacuumed off.
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You are done. Reverse the step to reassemble. I recommend white electric tape to put the part back on that you had to remove with the knife.
I had success with simpler steps
1 - Cleaning the top part, after removing the fixing bolt as described in steps 2 and 3; and
2 - Cleaning the bottom part, after unscrewing the four T8 screws located beneath the fan core as described in step 4.
The steps above are very much the easiest, because they don't require cutting anything or dealing with cables. I was able to vacuum out a lot of dust, and now the heater is working normally.It stopped working after a few days. No dust left anywhere, I suspect that it's an electronics failure. Not happy with the whole Dyson design - difficult to clean, complicated electronics for a simple task. Pity, the heater had been convenient until now.
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To reassemble your device, follow these instructions in reverse order. Tape the air slot assembly to the outside of the outer housing, or simply ziptie the top of the loop.
To reassemble your device, follow these instructions in reverse order. Tape the air slot assembly to the outside of the outer housing, or simply ziptie the top of the loop.
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댓글 11개
Hey, thanks for posting this. I used it as a general guide for my Dyson AM01 which also was throwing an error when using the heat function. Opened it up expecting to find and least some dust on the heating elements… and to my surprise and annoyance they were basically clean.
Any thoughts or other ideas? Not sure if there is a temp sensor incorrectly reporting the temperature of the heating elements that I can try to replace?
Thanks
Hi All, thanks for the walkthrough on opening up the heating elements. Same as David, I put up filters around the air intake since day 1 of owning the unit and the elements are clean without any clogs. (Confirmed once I opened up the unit).
I still get the H2 error whenever I use the heating function, I noticed that if I turn it to around 23-24C with the lowest fan speed, the H2 error may not come on. And often time I cannot increase fan speed probably due to some issues with the circuit board or components. I'm suspecting that the H2 error may be due to electrical/component failures because I have 2 units and both experienced H2 error.... I'm suspecting that they were built to have a life timer or something, and when the time comes, it'd fail no matter what.
Did some digging around on the components and it seems that the 2 components next to each heating elements are thermal switch and thermal fuse, I think that's just for safety purpose and they're not heat or flow sensors.
I'm stuck on step 7 since I don't know exactly where to cut. Is the air slot trim the silver/gray part on the outside? Is there any way more pictures could be provided? Thanks!
It is the outer grey rim that needs to be separated from the white body. See edits to the instructions for photos and details.
Adrian -
Are you &&^&^$^ with us?! There is absolutely no reason to use a razor knife to remove the air slot trim. In fact, for disassembly it’s only necessary to complete up to the second step. You don’t even have to pull the heating coil out!
Once the upper half is removed, use a long toothbrush to clean the heating coil. Tape a chopstick to a normal toothbrush if you’re desperate. I used a gun cleaning brush. From there some compressed air and a vacuum will finish the job
Hope nobody looses a finger jamming a knife into an area that shouldn’t be messed with…
The first instruction notes that no disassembly is necessary (not even up to the second step). The rest is provided to show how this conclusion was reached, and in case others are interested in how it's put together or want to disassemble for other reasons.
not every one is as lucky as you, I clean the top part with air gun, still getting h2, removed the base partially and air gun it, still getting h2, so I removed the blade completely, clean it well, still getting h2 when using heat. And there was a lot of dust compare what I see from other people's article.
before I found this article, I see lot of YouTube comments some are able to fix it with simple cleaning, some have to take the whole thing apart. Maybe it's good to be nice and respectful, so would know that you are a self-centred Mr. Know-It-All axxhole?
and thanks @breadandbits for sharing. :)
mioche -
Fantastic guide. Saved me a lot of money,.
Glad to hear it!
Thank you, very helpful. Didn't have the courage to the disassemble the air slot trim. Blew out the top part with 100 psi. Found a lot of gunk coming out from the fan core. Opened it up blowing 100 psi and repeating the process from top to bottom till the dust cleared out. My fan was just a bit dirtier than pictured. Thirty minutes running with the heater on, no H2 error code. In case the error comes back, I plan spray WD40 and repeat the cleaning process with compressed air. I'm just hoping for the best that it ends here.
